<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=\, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        *{margin:0;padding:0}
        button{
            position: absolute;
            right:0;
            top:0;
            width:40px;
            height:40px;
            background: url('images/icon.png') no-repeat center;
            border:none;
            outline: none;
        }
        button:hover{
            cursor: pointer;
        }
        .search{
            overflow: hidden;
            margin:100px;
            width:240px;
            height:40px;
            background: #EEEEEE;
            border:1px solid #666;
            border-radius: 30px;
            position: relative;
        }
        input{
            /* left:20px; */
            top:0px;
            position: absolute;
            padding-left: 20px;
            border:none;
            height: 40px;
            background: #eee;
            outline: none;
        }
    </style>
</head>
<body>
    <div class="search">
        <input type="text" placeholder="搜索">
        <button></button>
    </div>
</body>
</html>